import React, { Component } from 'react'

export default class ClassDefault extends Component {
  constructor(props){
    super(props)
    console.log(props)
  }
  render() {
    return (
      <div>
      a:{this.props.a},    b:{this.props.b},    c:{this.props.c}
    </div>
    )
  }
}
ClassDefault.defaultProps = {
  a:1,
  b:2,
  c:3
}